Bradford s



(No Model.)

B. S. MILES.

LOCK.

No. 497,588. Patented May 16, 1893.

UI-LL zg-L A YTOHNEYS.

UNITED STATES PATENT QEEICE.

BRADFORD s. MILES, OE GRAYS SUMMIT, MISSOURI.

LOCK.

SPECIFICATION forming part of Letters Patent No. 497, 588, dated May 16,1893.

Application iled December 12, 1892. Serial No. 454,903. (No model.)

l To all whom it may concern:

Be it known that I, BRADFORD S. MILES, of Grays Summit, in the county ofFranklin and State of Missouri, have invented a new and usefulImprovement in Locks, of which the following is a full, clear, and eXactdescription.

This invention relates to improvements in locks for doors, and has forits object to provide a novel, simple door lock and latch combined,which will be o f cheap and durable construction and that will bereliable in operation either as a latch or lock.

To these ends my invention consists in the construction and combinationof parts, as are hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a front view, partly in vertical section, of the improvementin position on a door and its easement, showing the interior mechanismin locked condition and the latch bolt in engagement with a hasp plateon the easement. Fig. 2 is a similar View showing the interior mechanismin unlocked condition and the latch bolt out of engagement with the haspplate. Fig. 3 is a transverse sectional view, on the line 3 3 in Fig. l.Fig. 4 is a similar view on the line 4-4 in Fig. 1. Fig. 5 is an edgeview of the improved hasp plate for the lock and latch. Fig. 6 is apartial Vertical section of the lock case, showing a modified form ofconstruction of the lock mechanism; and Fig. 7 is a side View of aspecial key employed with the modified construction of the lockmechanism.

The lock case A is of sufficient size to receive working parts, and bypreference is made rectangular, a removable cap plate A forming one sideof the case, and when in place retaining the working parts in properrelation.

An opening ais produced in one side wall of the lock case by removingmaterial, so as to permit the free action of a bolt B. As shown, thebolt Bconsists of an L-shaped bar of such proportionate size as willrender it effective in service, and is held pendently within the case Aby a pivot screw or rivet b that projects from the side of the case andpasses through alateral perforation in the end portion of one limb ofthe bolt B, so that the latter will be adapted to hang free with one ofits upright edges projected through and beyond the slot or Opening a inthe case, to have a locking engagement with a hasp plate of novelconstruction which will presently be described. 4

The hasp plate C is laterally recessed at c to receive the bolt B, andhas an eardformed at each end of the recessed portion, these beingperforated to permit the hasp to be secured with screws on the jamb ofadoor casement, as shown in Figs. 1 and 2. The Outer wall e of the haspC is thickened near its upper terminal and slopes or decreases inthickness toward the lower end, thereby producing an incline on theouter surface which extends downward and toward the other wall e whichis seated upon the jamb of the casement and thereto secured.

At aproper point, the L-shaped bolt B is engagedv by a transverse shankf, that projects through opposite slots f in the side wall and cap plateof the case A for an attachment thereto of the knobs B', these latteraffording convenient means for manipulating the bolt to release itfrom'the hasp plate C. The weight of the knobsB which hang from thelower limb of the bolt B aids in the normal projection of the lockingedge` of the bolt beyond the wall of' the case A.

When a door having the improved latching device is vibrated towardthejamb wherev on the hasp plate C is secured, so as to cause the edgeof the bolt B which normally projects beyond the lock case, to impingeon the downward and rearward sloping edge of the hasp plate, such acontact of parts will cause the bolt to swing away from the hasp platesufficiently to permit the door to be completely closed; the gravity ofthe bolt then causing it to assume its normal position, as indicated byfull and dotted lines in Fig. 1, and thus latch fast to the hasp plate.

A simple and reliable means to secure the bolt B from release whenlatched in the hasp plate, without using a key, so as to afford anunpickable night-latch, is provided, and consists of asmall shaft g,transverselyjournaled by its ends in opposite perforations of the lockcase and its cap-plate, at a point which IOO will locate the shaft abovethe upper edge of the horizontal member of the L shaped bolt B.

A small crank handle g', is formed on or secured to the end of the shaftg, that is in the lock case side wall which is within the house.

On the part of the shaft g that is between the case sides, a lip g2, isformed or secured, that is of a width which will permit it to movefreely, and of such a length as will cause its free end to engage ashoulder g3, formed on the bolt B,wl1ere its limbs join, and on theupper side of the horizontallimb. t To produce the locking shoulder g3,there is an elongated notch g4 formed in the upper edge of thehorizontal limb of the bolt B, that will permit the shaft g, to berocked so as to lock or release the bolt, the locking adjustment beingeffected when the bolt has been latched within the hasp plate C. It willbe evident that if the lip g2 is thrown so as to bear again the shoulderg3, it will be impossible for the bolt B, to swing away from the haspplate, and the door having the improvement will be secured againstattempts to open it from the outer side unless a hole is made in thedoor to allow the intruder to reach the tripping handle g.

The additional parts that constitute the preferred locking mechanismofthe improvement, consist essentially of a tumbler bar D, which isparallel on the sides and of a suitable length, having one end h made ofgreater width than the other end h', which latter is located near theupright member of the L- shaped bolt B. The edge portion of the tumblerbar D that is lowermost, is straight for a part of its length, near eachend, these straight parts resting upon two studs c', i', or equivalentprojections from the sidewall of the case A, and at a proper distancefrom these studs another stud 7c is projected from the case, betweenthem and nearly in the same horizontal plane.

Opposite keyholes m are formed in the case A and cap plate A at such apoint as will permit the ordinary key E to be inserted below and nearthe tumbler bar D, so that a rotatable movement of the key will -causeits lip to have contact with the lower edge of the tumbler bar, raise itslightly and project it toward the upright limb of the bolt B, a notchformed at n in the bar D, affording a shoulder for an engagement of thekey therewith.

A locking notch o is produced in the lower edge of the tumbler har D ata proper point, which will represent the extreme movement of said bartoward the depending limb of the bolt B when actuated by the key E, sothat when the tumbler bar is released from the key by a furtherrotatable movement of the latter, it will drop and the side edges of thenotch o will be caused to loosely embrace the stud 7s, thereby securelylocking the projected edge portion of the bolt B within the hasp plateC, as shown in Fig. l.

On the top edge of the tumbler bar D, a notch p is cut, of a sufficientwidth to allow a proper vibration of the pendent cheek bar F that isloosely inserted through a slot in the bar, which slot extends throughthe latter directly below the notch 1'), the upper end of the check barbeing pivoted to the case A at p so as to permit its main portion tohang pendent. An arm p2 extends from the upper end of the check bartoward the bolt B, and by its weight causes the pendent portion of saidbar to rest its rear edge against a stud q, and near the keyhole m. Thefunction of the check bar is to prevent an accidental or designeddisplacement of the tumbler bar D, when the parts are in lockedcondition by the engage- Inent of a locking shoulder 193 on the checkbar F with the upper edge of the part h of the tumbler bar D.

To release the bolt B, the key E is inserted in the keyhole m and turnedin the direction of the curved arrowin Fig. 1, which will swing thecheck bar F so as to release the tumbler bar D, the check bar resumingits vertical position after the key releases it. The further rotation ofthe key raises the tumbler bar, removes it from the stud 7c and slidesit until it assumes the position shown in Fig. 2. The bolt B being nowreleased a manipulation of either of the knobs B will enable theoperator to open the door. By closing the door and rotating the key inthe direction of the curved arrow in Fig. 2, the reverse of themovements above described takes place, whereby the parts assume theposition shown in Fig. 1, and the bolt B is locked in place in the haspplate C, and can be further secured bv rocking the shaft g, as beforeexplained.

" tShould it be desired to render the improved lock more secure, adetent block fr maybe employed in connection with the parts alreadydescribed, which block is shown in position in Fig. 6, and consists of acomparatively small piece of metal nearly rectangular in contour and datsidewise, that is pivoted to the side wall of the case A, near the loweredge of the arm p2 on the check bar F.

The pivot r that loosely secures the detent block o" upon the case wall,is inserted through a transverse hole in said block near its upper edge,so that when the parts of the lock are in locked adjustment, the lowerend of the detent block will hang above and close to the projection s onthe top edge of the tumbler bar, which projection forms a division wallbetween notches on the top edge of the bar named. A stud s that projectsfrom the case side wall at a proper point, forms an abutment for thependent detent block and limits theswinging movement of the lattertoward the pendent part of the cheek bar F. It will be seen that if thedetent block rhangs in the position indicated in Fig. 6, a rotatablemovement of the main key Ewill be prevented. j

In order to release the block rfrom a locking engagement with thetumbler bar D, a

IOO

IIO

body of the block r, and .has its side edges at a right angle With andnear a straight edge of the block o", which is nearest to the pendentbody of the check bar F. y

In use, the beveled end of lthe special key G is introduced within thekeyholett, a suiiicient degree to rock the pendent block r away from theprojection s on the tumbler bar D, so that the main key E may bemanipulated to unlock the lock, as before explained. f

The improved lock and latch herein described can be manufactured rapidlyVand at a low cost, and in use is as reliable as others that are muchmore expensive and compli cated. lt is further evident that from theconstruction of parts and their arrangement,'

no springs are needed to secure eicient action, and that durability isthus' afforded Vto the working mechanism of the improved device.

The parts ot the lock falling into their places by gravity alone, is animportant feature of excellence which will conduce to their effectiveaction, and avoid the Vfriction of springs that in some forms of locksare re! quired to move parts'into place, when they are actuated by a keyto lock or unlock the device.

I am aware that it is not new to arrange a pivoted swinging latch boltso that it normally projects from a lock case to engage a beveled haspor hasp plate, also that it is not broadly .new to combine with suchlatch bolt rotat-Iv able operating devices and pivoted locking devices.But my invention involves peculiarities, or essential novelty, in theconstruction, arrangement, and combination of parts, which confersuperiority and constitute an improvement in the art.

Having thus fully described my invention, I claim as" new and desire tosecure by Letters Patent- 1. In a door lock, the combination, with aArectangular case apertured at one side, an L- shaped pendent latch boltWithin the case and normally projected by its gravity through theaperture in the case, and a latch plate sloped on its Aface and adaptedthereby to vibrate the'pendent latchbolt, of a sliding tumbler bar D,arranged horizontally notched to receive a key, and also notched tointerlock with a stud projected from the side of the case, a pendentcheck bar F, pi voted at'its upper end and loosely engaging a slot inthe tumbler bar, and a rotatable key, substantially as described.

2. In a door lock, the combination with a case,a cap-:plate therefor,apendent L-shaped latch bolt within the case, and a hasp plate sloped onits face and adapted to rock the latch bolt, of a tumbler bar free toslide and adapted to lock on a stud projected from the case, a pendentcheck-bar passing through a slot in the tumbler bar, a rotatable'keythere- Vfor, a pendent detent block adapted t-o lock the tumbler bar onthe Stud, and avibratable key therefor, substantially as described.

j l BRADFORD s. MILEs Witnesses: i

` D. L. SMITH, Jr., A. L. WILLIAMS.

